package com.sky.service.impl;

import com.baomidou.mybatisplus.core.metadata.OrderItem;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.sky.annotation.AutoFill;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.enumeration.OperationType;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.Optional;

@Service
public class EmployeeServiceImpl extends ServiceImpl<EmployeeMapper, Employee> implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
//        Employee employee = employeeMapper.getByUsername(username);

        //判断对象是否为空 为空则抛出异常。不为空则返回对象
        Employee employee = Optional
                .ofNullable(employeeMapper.getByUsername(username))
                .orElseThrow(() -> new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND));

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
       /* if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }*/

        //密码比对
        //需要进行md5加密，然后再进行比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }
        //3、返回实体对象
        return employee;
    }

    @AutoFill(OperationType.INSERT)
    @Override
    public Result addEmployee(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();

        BeanUtils.copyProperties(employeeDTO, employee);
        employee.setStatus(StatusConstant.ENABLE);


        //基于注解修改
       /* employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());*/
        //设置密码，默认为123456
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));

        //从ThreadLocal中取出登录用户
//        Long userId = BaseContext.getCurrentId();
//        employee.setCreateUser(userId);
//        employee.setUpdateUser(userId);

        save(employee);

        return Result.success();
    }

    @Override
    public Result selectEmployeePage(EmployeePageQueryDTO employeePageQueryDTO) {

        //构造分页条件
        Page<Employee> page = Page.of(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());
        page.addOrder(OrderItem.desc("create_time"));
        Page<Employee> employeePage = lambdaQuery()
                .like(employeePageQueryDTO.getName() != null, Employee::getName, employeePageQueryDTO.getName())
                .page(page);

        return Result.success(new PageResult<>(employeePage.getTotal(), employeePage.getRecords()));
    }

    @Override
    public void startOrStop(Integer status, Long id) {
        lambdaUpdate()
                .eq(id != null, Employee::getId, id)
                .set(status != null, Employee::getStatus, status)
                .update();
    }

    @Override
    public Employee echoById(Long id) {
        return lambdaQuery().eq(Employee::getId, id).one();
    }

    @AutoFill(OperationType.UPDATE)
    @Override
    public void revise(Employee employee) {
        updateById(employee);
    }

}
